Introduction : Why theorize and can you learn to do it?. -- Part 1. How to theorize : Starting anew. -- Social observation. -- Naming, concept, and typology. -- Analogy, metaphor, and pattern. -- Coming up with an explanation. -- Part 2. Preparing for theorizing. -- Heuristics. -- Practical exercises. -- The role of theory. -- Imagination and art. -- Summary and more.